diff --git a/leetcode/1.py b/leetcode/1.py
new file mode 100644
index 0000000..d96e79e
--- /dev/null
+++ b/leetcode/1.py
@@ -0,0 +1,24 @@
+# Give a list and a number.
+# Return a list of indices of two numbers
+
+
+class Solution:
+    def twoSum(self, nums: list[int], target: int) -> list[int]:
+        answer = []
+        for i in range(len(nums) // 2 + 1):
+            if target - nums[i] == nums[i]:
+                continue
+            if target - nums[i] in nums:
+                answer.append(i)
+                answer.append(nums.index(target - nums[i]))
+                return answer
+
+        return answer
+
+
+"""
+test = [1, 2, 3]
+TARGET_NUMBER = 3
+a = Solution().twoSum(test, TARGET_NUMBER)
+print(a)
+"""